Technical
Precast or cast in place? A practical comparison
Speed, quality control and site disruption: where factory-made concrete pulls ahead, and where pouring on site still makes sense.
TopicTechnical
Published
Reading time1 min read
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Both methods use the same material. The difference is where the concrete cures: in a controlled factory, or in a trench open to the weather.
Where precast wins
- Installation in hours instead of weeks of formwork and curing
- Consistent strength from controlled mixing, vibration and curing
- Every unit can be inspected before it leaves the yard
- Shorter road closures and less disruption for neighbours
Where cast in place still fits
Very large or irregular structures that cannot be transported, or sites without crane access, may still be better poured on site. Even then, precast elements are often combined with in-situ concrete for the parts that repeat.
For standard drainage, culverts and channels, precast is usually the faster and more predictable choice. Talk to our engineers if your site sits somewhere in between.
